n.

1. 清除，清扫；出空
2. 空地；空隙
3. （船只）结关；出入港许可证
4. 清仓大拍卖

n.

1. the action or process of clearing or of being dispersed.
   ▸(in soccer and other sports) a kick or hit that sends the ball out of a defensive zone.
2. official authorization for something to proceed or take place.
3. clear space allowed for a thing to move past or under another:
   give cyclists plenty of clearance.
4. Snooker  the potting of all the balls remaining on the table in a single break.